Electric braking device

Abstract

An electric braking device includes a transmission mechanism including an input gear configured to input rotation of a motor shaft member and an output gear configured to be rotatable in response to rotation of the input gear and transmit the rotation to an actuator unit. The electric braking device includes a circuit unit including a circuit board and mounting components mounted on the circuit board. In the electric braking device, the circuit board and an electric motor are disposed such that a virtual plane parallel to the circuit board intersects an axial direction of the motor shaft member. In the electric braking device, the output gear is disposed so as to intersect a specific plane P2 that is a plane passing through the circuit unit among virtual planes parallel to the circuit board.

1 . An electric braking device comprising:
 an electric motor configured to rotate a motor shaft member;   an actuator unit configured to move a friction material in response to rotation of the motor shaft member in the electric motor, and generate a braking force on a wheel of a vehicle by pressing the friction material against a rotary body that rotates integrally with the wheel;   a transmission mechanism configured to transmit a rotary motion of the motor shaft member to the actuator unit, and including an input gear configured to input the rotation of the motor shaft member, and an output gear configured to rotate in response to rotation of the input gear and transmit the rotation to the actuator unit; and   a circuit unit configured to control the electric motor, and including a circuit board and a mounting component mounted on the circuit board, wherein   the circuit board and the electric motor are disposed such that a virtual plane parallel to the circuit board intersects an axial direction of the motor shaft member, and   the output gear is disposed to intersect a specific plane which is a plane that passes through the circuit unit among the virtual planes.   
     
     
         2 . The electric braking device according to  claim 1 , wherein the output gear and the circuit board are disposed such that a surface of the output gear orthogonal to an axial direction of a shaft member of the output gear is parallel to the circuit board. 
     
     
         3 . The electric braking device according to  claim 2 , wherein
 the specific plane passes through the mounting component of the circuit unit, and   the output gear is disposed at a position shifted in the axial direction of the motor shaft member with respect to the circuit board.   
     
     
         4 . The electric braking device according to  claim 3 , wherein the circuit board is disposed to face the output gear. 
     
     
         5 . The electric braking device according to  claim 2 , wherein the specific plane passes through the circuit board of the circuit unit. 
     
     
         6 . The electric braking device according to  claim 5 , wherein the input gear is disposed at a position shifted in the axial direction of the motor shaft member with respect to the circuit board, and the circuit board is disposed to face the input gear. 
     
     
         7 . The electric braking device according to  claim 4 , wherein the input gear is disposed at a position shifted in the axial direction of the motor shaft member with respect to the circuit board, and the circuit board is disposed to face the input gear. 
     
     
         8 . The electric braking device according to  claim 3 , wherein the input gear is disposed at a position shifted in the axial direction of the motor shaft member with respect to the circuit board, and the circuit board is disposed to face the input gear. 
     
     
         9 . The electric braking device according to  claim 2 , wherein the input gear is disposed at a position shifted in the axial direction of the motor shaft member with respect to the circuit board, and the circuit board is disposed to face the input gear.